RB Leipzig will be without injured left back Castello Lukeba for Tuesday’s Champions League match at Scotland’s Celtic, but goalkeeper Peter Gulacsi is fit to play. Lukeba missed final training on Monday, and sporting director Rouven Schröder said after the session that “it doesn’t make sense to bring a player along and then treat him in-between.” Lukeba had also missed Saturday’s 2-1 Bundesliga defeat at Borussia Dortmund with a thigh muscle problem. Schröder said there was a danger that he would play if he was included in the squad for the match at Celtic Park. “We always said that a player …